Method of removing deposits on refrigeration system surfaces

Details Method of removing deposits on refrigeration system surfaces Method of removing deposits on refrigeration system surfaces

1977-06-02

1978-11-07

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 38, 134 39, 134 41, B08B 308

Patent

active

041244087

ABSTRACT:
A polymeric residue with one or more metals, salts, and oxides mixed therein, deposited on refrigeration system surfaces by a circulating halogenated hydrocarbon refrigerant, is removed from a surface by contacting the residue with a saturated aqueous solution or slurry with a pH from 2 to 4 of ethylenediaminetetraacetic acid at temperatures from 30.degree. C to 100.degree. C.

REFERENCES:
patent: 2356254 (1944-08-01), Lehmann et al.
patent: 3391084 (1968-07-01), York
patent: 3481870 (1969-12-01), Cheng et al.
patent: 3664870 (1972-05-01), Oberhofer et al.
patent: 3684720 (1972-08-01), Richardson
patent: 3721629 (1973-03-01), Goodenough
patent: 3826312 (1974-07-01), Richardson et al.
Pfizer Co., Inc., "Pfizer Aminocarboxylic Chelating Agents", (Data Sheet 605), 1963, p. 12.

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